From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Stuart MacDonald" Subject: Re: RS485 communicatio Date: Sun, 16 Mar 2003 18:47:02 -0500 Sender: linux-serial-owner@vger.kernel.org Message-ID: <070201c2ec16$586a6ac0$294b82ce@connecttech.com> References: <20030313061505.5944.qmail@indiainfo.com> Return-path: List-Id: linux-serial@vger.kernel.org To: Linux PPP , linux-serial@vger.kernel.org From: "Linux PPP" > am currently working on PPP over serial interface (RS485) in linux 2.4.2-2. I believe RS485 half duplex system and hence only one can transmit at a time. And for RS485 we basicaly use Master-Slave or Primary-Secondary kind of communication. I don't know how to achieve the [snip] > This point to point communication worked fine with RS485 interface. If i had to connect one more node what i need to do. Please clarify with the following > > i) Whether the existing pppd takes care of the RS485 with multi node , if so how do i manage giving commands PPP is designed to connect two logical endpoints together. 485 multidrop is a one to many setup, which seems to me is logically incompatible with PPP. At least, simultaneously. ..Stu -- We make multiport serial boards. (800) 426-8979